Vastaus: #m = 7 # #n = 6 # Selitys: # 5m - 4n = 11 # EQN 1 # 3m = n + 15 # EQN 2 # 3m - 15 = n # EQN 3 Korvaa EQN 3 EQN 1: ksi # 5m - 4 * (3m-15) = 11 # # 5m - 12m + 60 = 11 # # -7m = -49 # #m = 7 # Kun # M = 7 #, # 3 (7) = n + 15 # #n = 6 # Tarkista, onko vastaukset laskettu oikein. #5(7) - 4(6) = 11# #3(7) = 6 + 15#